Any info on this sub?

[AJM511 10+ year member]

My friend just got an old school jl audio 12ib4, and I have no info on it other than its supposed to be a free air sub. What does that mean? Any other info?

http://image.nengun.com/used/original/nengun-87424-00-unknown-jl_audio_-_in_12_30cm_subwoofer_12ib4.jpg

Click to read more...

 

[thevic24 5,000+ posts]

Here ya go.

Dont see to many of these around any more

http://mobile.jlaudio.com/pdfs/8-12IB4_BDS.pdf

Free air basically means that they do not require a box. They just need a good baffle to do what they do.

 

[AJM511 10+ year member]

Could I put it in a box? Specifically 2ft^3 @ 37 hz?

 

[thevic24 5,000+ posts]

It says in the link above that they *may* be used in a LARGE sealed box of at leas 8cuft:crazy:

and NOT recommended for ported.

 

[AJM511 10+ year member]

OH. 8 cubic ft. awesome. So basically he would have to make an infinite baffle setup or not use it?

 

[thevic24 5,000+ posts]

It seems that way. I have no experience with this JL.

But hey, it wont hurt to experiment some if you can.

 

[R34P3R 10+ year member]

OH. 8 cubic ft. awesome. So basically he would have to make an infinite baffle setup or not use it?

I would hate to see the box requirements for an 18...

 

[whitedragon551 5,000+ posts]

Could I put it in a box? Specifically 2ft^3 @ 37 hz?

Depends on the TSP's.

Being a sub built for infinite baffle I doubt that enclosure would work.

 

[09civic 5,000+ posts]

I would hate to see the box requirements for an 18...

you would have to put it in a bus...